Name space quirk?

[piet at cs.uu.nl]

>>>>> Alex <new_name at mit.edu> (A) writes:

A> Hi, Gangadhar.  I hope I'm addressing you appropriately. :)

A> The issue there is that the "if __name__ == '__main__':" block is not
A> executed when the module is imported, because in that case, "__name__"
A> is bound to the name of the module, in this case, "nspace".  As a
A> result, in the "nspace" namespace, nothing is bound to "myfile", so the
A> "myfile.write" command raises a NameError.  The "global" keyword only
A> means "global to the module" not "global to the entire program."  The
A> "myfile" you bound in the interpreter is in the "__main__" namespace.

A> Try this version:

A> #!/usr/bin/env python

A> from os import sys
 
A> def hello (outfile = sys.stdout):
A>         # We are writing to what should be an
A>         # unknown file descriptor:
A>         global myfile                         # <------- Added
A>         myfile.write ("Hello, world!\n")

But why do you have a parameter outfile that you don't use. Don't you just
means outfile.write()?
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP]
Private email: P.van.Oostrum at hccnet.nl